Ubuntu 更换中国镜像

1. 查看系统版本号

cat /proc/version

Ubuntu 24.04：noble
Ubuntu 22.04：jammy
Ubuntu 20.04：focal
Ubuntu 18.04：bionic
Ubuntu 16.04：xenial

2. 更新为清华大学的镜像

访问 https://mirror.tuna.tsinghua.edu.cn/help/ubuntu/ 按照教程将 /etc/apt/sources.list 备份并将清华大学给的镜像配置放入 sources.list 中

# 默认注释了源码镜像以提高 apt update 速度，如有需要可自行取消注释

deb https://mirrors4.tuna.tsinghua.edu.cn/ubuntu/ noble main restricted universe multiverse

# deb-src https://mirrors4.tuna.tsinghua.edu.cn/ubuntu/ noble main restricted universe multiverse

deb https://mirrors4.tuna.tsinghua.edu.cn/ubuntu/ noble-updates main restricted universe multiverse

# deb-src https://mirrors4.tuna.tsinghua.edu.cn/ubuntu/ noble-updates main restricted universe multiverse

deb https://mirrors4.tuna.tsinghua.edu.cn/ubuntu/ noble-backports main restricted universe multiverse

# deb-src https://mirrors4.tuna.tsinghua.edu.cn/ubuntu/ noble-backports main restricted universe multiverse

# 以下安全更新软件源包含了官方源与镜像站配置，如有需要可自行修改注释切换

deb http://security.ubuntu.com/ubuntu/ noble-security main restricted universe multiverse

# deb-src http://security.ubuntu.com/ubuntu/ noble-security main restricted universe multiverse

# 预发布软件源，不建议启用

# deb https://mirrors4.tuna.tsinghua.edu.cn/ubuntu/ noble-proposed main restricted universe multiverse

# # deb-src https://mirrors4.tuna.tsinghua.edu.cn/ubuntu/ noble-proposed main restricted universe multiverse